US Bridges

FM over Hinkle Creek

Poor

Benton County, Iowa · 085112804 · Structure no. 000000000072801

Built
1988
37 years old
Condition
Poor
inspected April 2023
Type
Slab
Concrete Continuous
Length
91 ft
3 main spans
Daily traffic
530
2021 count
Owner
County
County Highway Agency

About this bridge

FM over Hinkle Creek is a concrete continuous slab carrying FM over Hinkle Creek in Benton County, Iowa. It was built in 1988, so it is 37 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 530 vehicles a day, roughly 13% of them trucks, projected to reach 530 by 2043. The structure is 91 ft (27.7 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFM
CrossesHinkle Creek
Location085112804
RouteCity Street 0
StateIowa
Coordinates42.14103, -92.14378
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.3 US tons
Inventory rating40.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length91 ft (27.7 m)
Longest span34 ft (10.4 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2021)
Projected traffic530 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Hinkle Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is FM over Hinkle Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does FM over Hinkle Creek carry?

About 530 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is FM over Hinkle Creek?

The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 33 ft wide.

Who owns FM over Hinkle Creek?

It is owned by the County Highway Agency.